Liquid ejecting head and liquid ejecting apparatus

Abstract

A liquid ejecting head and a liquid ejecting apparatus that can suppress the influence of noise on a control signal includes a plurality of terminals for being electrically connected with a contact point provided in a liquid ejecting apparatus, and a liquid ejecting element substrate having a liquid ejecting element formed for ejecting liquid in response to a control signal transmitted from the liquid ejecting apparatus. The plurality of terminals includes signal terminals and ground terminals for control, for controlling the liquid ejecting element, and the signal terminals and the ground terminals for control are arranged at positions closer to the liquid ejecting element substrate than other terminals.

What is claimed is: 
     
       1. A liquid ejecting head comprising:
 a plurality of terminals for being electrically connected with a contact point provided in a liquid ejecting apparatus; and 
 a liquid ejecting element substrate having a liquid ejecting element formed for ejecting a liquid in response to a control signal transmitted from the liquid ejecting apparatus, 
 wherein 
 the plurality of terminals includes signal terminals and ground terminals for control, for controlling the liquid ejecting element, 
 the plurality of terminals are arranged such that a plurality of terminal rows, in which a plurality of terminals is arrayed in a first direction, is arranged in a second direction that is perpendicular to the first direction, and 
 the ground terminals are arranged at both ends of one terminal row that is positioned closest to the liquid ejecting element substrate among the plurality of terminal rows in the second direction and the signal terminals are arranged between the ground terminals. 
 
     
     
       2. The liquid ejecting head according to  claim 1 , wherein
 the plurality of terminals includes an electric source terminal for drive and a ground terminal for drive, for driving the liquid ejecting element, and 
 a signal wiring that connects the signal terminals with the liquid ejecting element substrate is arranged outside a region between an electric source wiring that connects the electric source terminal for drive with the liquid ejecting element substrate and a ground wiring that connects the ground terminal for drive with the liquid ejecting element substrate. 
 
     
     
       3. The liquid ejecting head according to  claim 1 , wherein
 the ground terminals for control are arranged so as to sandwich the signal terminals therebetween. 
 
     
     
       4. The liquid ejecting head according to  claim 3 , wherein
 all of the signal terminals are included in the one terminal row that is arranged at a position closer to the liquid ejecting element substrate than other terminal rows. 
 
     
     
       5. The liquid ejecting head according to  claim 4 , wherein
 all of the signal terminals are arranged in the one terminal row arranged in a position closest to the liquid ejecting element substrate and in another terminal row arranged in a position close to the liquid ejecting element substrate next to the one terminal row. 
 
     
     
       6. The liquid ejecting head according to  claim 5 , wherein an electric source terminal for control for controlling the liquid ejecting element is arranged at both ends of the other terminal row arranged in the position close to the liquid ejecting element substrate next to the one terminal row, in the second direction. 
     
     
       7. The liquid ejecting head according to  claim 1 , wherein
 a ground terminal for drive for driving the liquid ejecting element is arranged at a position farther from the liquid ejecting element substrate than a position of the signal terminals, and 
 an electric source terminal for drive for driving the liquid ejecting element is arranged at a position farther than the farther position. 
 
     
     
       8. The liquid ejecting head according to  claim 7 , wherein the electric source terminal for drive and the ground terminal for drive are arranged adjacent to each other. 
     
     
       9. The liquid ejecting head according to  claim 1 , wherein the signal terminals and the ground terminals for control are arranged so as to be simultaneously connected to the contact point or the ground terminals for control are connected prior to the signal terminal. 
     
     
       10. The liquid ejecting head according to  claim 1 , wherein the liquid ejecting head is rotated with respect to the liquid ejecting apparatus to be mounted thereon. 
     
     
       11. A liquid ejecting apparatus capable of mounting a liquid ejecting head, wherein
 the liquid ejecting head has a plurality of terminals for being electrically connected with a contact point provided in a liquid ejecting apparatus; and a liquid ejecting element substrate having a liquid ejecting element formed for ejecting a liquid in response to a control signal transmitted from the liquid ejecting apparatus, 
 the plurality of terminals includes signal terminals and ground terminals for control, for controlling the liquid ejecting element, 
 the plurality of terminals is arranged such that a plurality of terminal rows, in which a plurality of terminals are arrayed in a first direction, is arranged in a second direction that is perpendicular to the first direction, and 
 the ground terminals are arranged at both ends of one terminal row that is positioned closest to the liquid ejecting element substrate among the plurality of terminal rows in the second direction and the signal terminals are arranged between the ground terminals. 
 
     
     
       12. The liquid ejecting apparatus according to  claim 11 , wherein the liquid ejecting head is mounted so as to be electrically connected to the ground terminals for control prior to or at the same time as the signal terminals. 
     
     
       13. The liquid ejecting apparatus according to  claim 12 , wherein
 the contact point is an electric connection pin that projects toward an outside from a surface facing the terminals, and 
 an electric connection pin to be electrically connected with the ground terminals for control projects more toward an outside than other electric connection pins.